Mystery Case Files (also known as MCF) is a video game series originally developed by the internal studios of Big Fish Games. New installments are currently developed by Eipix Entertainment, replacing Elephant Games who developed sequels from 2013 to 2014. The Mystery Case Files series is known for its ‘Hidden Object’ puzzles where, in order to progress through a game, the player must find a certain number of items hidden somewhere on a painted scene.